I combined my accounts yesterday and this appears to have worked, although can't have been difficult to merge zero activity from SPG. Website works fine but the mobile app is still refusing to log me in, insisting that I use a membership number and if I do, it tells me the password is wrong, even though it works on the website. Have uninstalled and reinstalled the app a couple of times now. Unfortunately I can't even log into the app to log out. A right kerfuffle.